They look ok but I'm worried about the mini jack connections. Cheap mini audio jacks sometimes have bad connection with your mini plug and that could be a problem in the future. I'd suggest getting RCA switches instead of 3.5mm switches. But I won't be worried about any sound loss due to the switcher itself, internals are too short to affect it.
Of course some people believe in cryo dipped pure silver litz fairy dust interconnects, they might steer clear of these switches.
They won't have static problems because all negative terminals are connected together. So if you got a continuity tester or multimeter, you can see the negative jack for all inputs and outs has continuity, and it goes all the way into your sound card.
Cables though are a little dicey. My advise is to get mid priced cables or extensions, not the ones you get at dollar stores. I've had RCA to mini cable with reversed L-R channels, some stop working after a few weeks, some cables were made with pot metal wires (pot metal is just mixture of excess metal garbage during manufacturing) and they sounded bad. Like I said, super cheap dollar store/hardware store cables.
As long as the mechanical link between adapters and switches and jacks are strong/firm, you shouldn't have problems or loss in sound quality. Only way to know is to test them, so go to a brick and mortar store.